[gabrielm05]

Thank you for the feedback, I really appreciate your insight on preservation and microbiological safety.

To clarify, the formula uses Spectrastat (1%) from Inolex as the core preservation system. It’s a broad-spectrum, preservative-free blend based on caprylhydroxamic acid, and has shown effectiveness even against Gram-negative bacteria when properly formulated. That said, I fully understand the concerns about rinse-off exposure to tap water, and it’s something we’re monitoring closely as we move toward formal testing.

The product is packaged in glass pump bottles, chosen specifically for their airtight design, chemical stability, and reduced contamination risk from repeated handling. The pumps have non-metallic, lockable closures to further minimize backflow and microbial ingress.

Regarding Gluconolactone, it was selected not only for its chelating function but also for its skin benefits, including gentle exfoliation, hydration, antioxidant activity, and barrier support. We opted not to use EDTA in this version due to our focus on sensitive skin compatibility, but I’m definitely open to revisiting it based on PET results or user feedback.

As for QA/QC capability, I’m still early-stage and currently working as an independent founder. I haven’t completed microbiological challenge testing or stability studies yet, but I’m actively looking to partner with a lab or chemist who can help perform those next steps and build out appropriate QA/QC processes for production.

[gabrielm05]

However, I’ve run into a significant issue: the natural odor of the formulation — specifically a slightly unpleasant scent from the Sodium Cocoyl Alaninate — is noticeable now that it’s fragrance-free.

Here’s the complication:
I’ve already ordered my packaging with labels screen printed directly on the bottles, and I’ve also published a detailed breakdown of the INCI list on my blog, so I’m locked into this exact formula from a communication and compliance standpoint. That means I can’t add any new ingredients to help mask or adjust the scent.

Given this constraint, I’m unsure how to proceed. Is there any way to reduce or neutralize the odor using formulation techniques that don’t require declaring additional ingredients? Or could minor adjustments to the surfactant ratios or process help soften the smell without compromising the formula’s performance?

• This reply was modified 11 hours, 8 minutes ago by  gabrielm05.